Sand-blast machine.



C. A. DREISBAGH. SAND BLAST MACHINE.

urucnxon FILED 11.21, 1909 Patented Feb. 1, 1910.

INV N OR guluibruhd ATTQRNEYS o. A. DREISBACH. SAND BLAST MACHINE.

APPLICATION FILED APR.21.1909

Patented Feb. 1, 1910.

2 SHEETS-SHEET 2 invention, thecoyerzzbeing o 30 longitudinalfsectaone-ipa y 50 passing through-gu cizmmsnhi mmsnacrrlorlmew; 'comwcrrour, ASSIGNQRQOIqONieHALF"r I -wnmmmsonn smrrn, or new. nay-mt, coma-renew.

- s'aNn-a-Las'riracnms.

. waiv Be [it knowng thatiI, Gimme A. I Dams neon; a citizen lof the a United States of America, hand 'residing--iat yNew Haven in theicountytofNeWQHaVen-and-State of 011- 1 necticu 'ghayesin'vented =a,-certain new and useful mproilement in"'Sand-'=Blast. Machines,-of iwhich theffollowing is a specification." a f zMy 'iinventi'onHrelates1;to -tsand blast machines, and -,it -;is one of the-objects of my in vention .to ;provide;iazlsuitable;and improved machine-ion {the treatment of-.small eastings or thelike ..by.tumb'1ing.;thesame jinrthe presence of a-flcontinuousisand-ebla st, {wherebyall the .surfacesi-thereof-are subjected to the .action of the blast.

- are. the recuperatronand::reusef the .sand 20 over and overs-again (without-"handling, the prevention oigdust; ther -arrangement of parts so. that?'all'eis hall": :rreddiljr-Jccessible, and the leconomieal,tefiicient and convenient structural {and emotional-{features more m11y-. -.see foljthiiiine-the drawings 1 and subiq aficription-zy..

- Referring/toz-the adlfawingsii-Figure '1 is a front 'elevationeofaemachinev embodying my ';f-Fig. 2 is a ynbroken away; and Fi 3: is-arean'elevation of the machine.

sire" speed, the, other avheels iTrt'ating as 4 0'idlers. The-rear=headi16 of the drumtis stationary being' riveted-to angle irons 17 eextendinggacross the egd -ofathe frame 14. The"I'ronthead comprises a door 18 carried by a hingelflsvhich isswun from one of the uprights 0f the frame'l 4'. A central trunmoni-20-perinits the -door;tor-rotate with the drum t0:which. it;is secured by bolts 21. These bolts-aretattach'ed-xat one-end to a cam -member:22 controlledbytheisvheel, 23,- and, ides 24, engage -behindthe-inwardly;pro ectingi-flange of the bear in min .11-.0 Iithe-front endof the drum.

ithgnrthe' :drum 1 -arrange a removable screen. ml 25 -reinforced both within and without; bychannel bars426'extending length- Specification of I-etters mm. i ueauen:a1eii' April 21,--1ao9. Serial1Iio..491,889.

Patented'Feb. 1,-1910.

f wise ofJ-thebarrel and by internal angle rings 27 at each end. This screen barrel is provided with a head 28 at the end adjacentthedoor 18- but is open at the otherend to permit the ready char 'ng-anddischargm -66- from theudrum'and to permit its-entry into the drum. Thes external 'channelfihars :26 engage guide bars-29 ,orithe inner faceoi the um which act not onl ;-as' ides-v on the insertion and 'withdrawa of t e barrel, but also serve to impart; to: .the,.;latter the rotary-motion of the :drum.

rExtending inwardlyfrom andearriedg-by the stationary head. 16 -ofthe'- vdrun the sand trough 30 into r-whichythe sand continually-d schargediby thescoops -31.on.,the, 7 Other important objects; ;of; my. invention drum, during the operation of the machine.

Passages 32 open from-this trbugh into'the v blast nozzles. 33connected with the com-'75 ressed air pi e34. vA stirrer-35,;driven pm the sha t :15, not 'only prevents ,the -'sand from caking in this bottom of: the trough but also distributes .the same'evenl to. the -.blast-nozzles,-.while a-valve 36 -wit handle 37 controls the amd'unt of sand supplied to the-nozzles, A' 'valve 38 is provided for the air ipe. To permit the es cape of dust;- a ho e39 with pipe flange 40 isopened'through'theupper portion of the stationaryhead 16. I j I The operation of the machine is readily vunderstood. .li'he screen barrel 25 havin keeps it agitated. Dust is carried oif through the hole 39 by .the.-air. from the blast nozzles. 'Whenthe castings-have; been sufliciently-smoothed,- the drum is: halted and the sand blast stopped; the door (ripened and .the screen barrelra-wn ou t an emptied, when it is again rady for charging and the process may be repeated. Obviously-various changes -1I1d6t3l1'0f construction maybe made and the machine m le,substantial y as describ d;

@125 frotary-d ium n a 1 -"=-'o'neend'w1th a 'ventio afsandblast mechanism arrang requirements withont deadapted various arting-from m invention andI do not iimit-myselftot e precisestructureshownr in the screenand means for automatically returning the used sand to the blast mechanism durin 'substa-ntia y as described. 3

frame, rollers journaled therein, a rotary drumsupfiorted thereon, a removable screen rotating t erewith arranged within the same and adapted to carry the objects-to beoperated upon,-s and blast mechanism arranged I withinsaidgscreen and means for automat- J ically.returning the-nsed sand ,to the blast of the' 'ma' mechanism durin the operation 1 :13. A sand blast .machine, 'comprisin a stationary I ening and-a sand "blast. mechanism earrie by said headand v xtending'longitndinally into said drum and 'a rotary door at the other end of said drln'n .-a0 jf0r the*admission and withdrawalof the "objects. to be acted. upon by said blast.

,4, Ina sand blast machine, a-rotar druni' upon,

be acte ffo i" tumbling the objectsto ed Within the same; and .means in connection with said for collecting and retnrnmgto said for carrying the objects tothe operation of themachinep the o eration of the machine,

\ 5. n a sand blast machine an outer the same, said bar'fel being "closed at one for rotating said barrel to tumble said' ob jects during the operation of said blast.

having a stationary head with vent hole having astat-ionary head, a sand trough carried by said head, communicatingwith sai'djtrough and an air blast pipe passingl. through said head and opening intosai nozzles, .f.t ogether with means-t0 control the supply or air and means to control the supply o sand'to said nozzles. In testimony .;whereof I have signed my a n Q and a removable screen barrel for "carrying?- the objects to be acted on, arranged within" end only, a sand blast mechanism and means 8. In'a sand blast machine, a rotary drnm' blast mechanism the sand ein l y d d ring-1 6. In a sand blast machine, a rotary drum therein adaptedto receive a dust pipe, and r V I a .sand blast mechanism arranged within 2,. A 'sand blast machine, comprising a* a, series of blast nozzles name to thisf -specification,, in the presence of two subscribing witnesses,

. .LCH LES witnessesi Gnonen Learn Prom;

HENRY S. L.

P EI B CH- 7-- 

